Memory Management Questions and Answers

Answer: D

Correct answer: called by other programs

A subroutine exists to be called: control passes to it, it does its work, and control returns to the point after the call. That is what distinguishes it from a variable or a constant.

Answer: A

Correct answer: one-dimensional array

DIM num(10) gives a single subscript, so the array is a list of ten elements - one-dimensional. Two subscripts would give a table.

Answer: A

Correct answer: array in BASIC

The line number at the start and the parenthesised subscript num(subs) are BASIC's notation. Pascal and COMAL use square brackets and no line numbers.

Answer: C

Correct answer: 100 Area: = Width*Length

COMAL keeps BASIC's line numbers but takes Pascal's assignment operator, so the statement carries both: the number 100 and the symbol :=. That mixture is exactly what COMAL was designed to be.

Answer: C

Correct answer: both (a) and (b)

A data type is defined by how its values are stored - how many bytes, in what representation - and by what may be done with them. Integers and reals differ in both respects, which is why the two together define the type.

Answer: A

Correct answer: procedure

Stepwise refinement breaks a task into smaller tasks, and each is written as a procedure. That is what allows the top level of the program to read as a summary of what it does.

Answer: A

Correct answer: real numbers

Division rarely gives a whole result, so the variable must be able to hold a fractional part. The real type does; the integer type would silently discard the remainder.

Answer: B

Correct answer: source program

The program as the programmer writes it is the source; what the translator produces from it is the object program or machine code.

Answer: A

Correct answer: procedure

Both COMAL and Pascal call a named, callable block a procedure. A function is the variety that returns a value.

Answer: A

Correct answer: elements

The individual items that make up a data structure are its elements. The structure is the arrangement; the elements are what it arranges.